Screen



"Mar h 30,1943 'R. D. HELLER I 2,314,878

SCREEN Filed May 12, 1939 2 Sheets-Sheet 1 f/VVE/YTOR. RICHARD D. HELLER,

' ATT'Y March 30, 1943. R. D. HELLER SCREEN 2 Sheets-Sheet 2- Filed May12, 1939 Lun s H [N VE/Y TOR:

RICHARD D. HELLER,

Patented Mar. 30, 1943 UNHTED gTTES TENT OFFICE This invention relatesto a screen and more particularly to an improved form of screen frame orscreen deck.

An object of the invention is to provide an improved screen and animproved screen deck in which the deck is provided with reinforcing andguide means of an improved and simple structure.

Other objects of the invention will appear hereinafter, the novelfeatures and combinations being set forth in the appended claims.

In the accompanying drawings,

Fi l is a side elevational view of the screen comprising my invention;

Fig. 2 is a rear elevational view of the screen of Fig. 1;

Fig. 3 is a transverse sectional View taken on the line 33 of Fig. 1,looking in the direction of the arrows; and

Fig. 4 is a View similar to Fig. 3 with certain parts removed and whichis foreshortened showing a modified form of screen cloth tensioningmeans.

Except for the improved structure of the screen deck or sash it may bestated that the complete screen comprising my invention followsgenerally the disclosure of the patent to James A. Flint, No. 2,153,243,dated April 4, 1939.

Briefly described, the screen comprises a deck or sash I which isadapted to be vibrated by a vibratory motor II of the type disclosedmore in detail in the above mentioned patent to James A. Flint. Thecomplete screen structure is supported by shock-proof hangers I2, I2which are attached directly to the motor I I and one or more hangers I3attached to the deck or sash It.

The deck or sash I0 is formed by a pair of upright spaced metal sidemembers I4 and I5 which are preferably in the form of channels in thatthey have integral top and bottom flanges, those associated with theside member IA being seen at I6 and I1, respectively, and thoseassociated with side member I5 being seen at I8 and I9.

The side members I i and I5 are also provided with outwardly extendingreinforcing webs and 2|, respectively. Extending transversely across thetops of the side members I4 and I5 and rigidly attaching them togetheris a plurality of angle members 22, of which there are three illustratedin Fig. l of the drawings. Extending across the bottoms of the sidemembers I4 and I5 and also rigidly attaching them together is aplurality of channel members 23 of which there are five, as illustratedin Fig. 1 of the drawings. The channel members 23 have their endsrigidly attached to attaching plates 24, as by welding, which attachingplates 24 are preferably riveted to the adjacent side members I4 and i5.It is thus seen that a very rugged deck or sash I!) has been provided.

The motor II is attached to the deck II) We pair of spaced channelshaped arms 25 and 26 pivotally attached, as by bolts 2'! and 28,respectively, to the side members I4 and I5.

To provide for an angular adjustment between the arms 25 and 26 and theplane of the deck or sash ID the side members I4 and I5 are providedwith arcuate flanged plates 29 and 30, respectively, which are providedwith a plurality of holes, those in the plate 29 being seen at 3|, whichare adapted selectively to receive removable bolts 32 and 33,respectively, which extend through holes in the arms 25 and 26 which arealigned with the aforementioned holes in plates 29 and which are seen at3| in plate 29.

Extending between the side members M and I5 is a screen cloth 34 whichpreferably takes the form of the screen cloth disclosed and claimed inmy copending application Serial No. 234,014, filed October 8, 1938,Patent No. 2,283,877, granted May 19, 1942, for a Screen, but it isunderstood that other types of screen cloth may be employed.

Briefly described, the screen cloth 34 comprises a plurality ofnon-woven or parallel wires 35 which are preferably formed of highcarbon steel. The opposite ends of each of the wires 35 are rigidlyattached, as by soldering, to end bars 36 and 31. Intermediate the endsof each of the wires 35 the screen cloth 34 is supported bylongitudinally extending wood strips 38 supported in channel guides 39which extend longitudinally of the deck or sash I0 and are supportedupon and rigidly attached to the channel members 23.

It has been found in practice that a screen cloth, particularly whenformed of these parallel strands of high carbon steel, need to betensioned at a very high tension and consequently it is. necessary tomake the side members of the deck or sash very strong to prevent theirbuckling or distorting when the screen cloth 34 is tensioned. It is alsonecessary to assure proper alignment of adjacent wires 35 of thecomplete screen cloth 34 when said screen cloth 34 is made up into aplurality of sections, as it often is. That is, there will be aplurality of sections forming a complete screen cloth 34 each includingseparate pairs 'of end bars 36 and 31 with rigidly attached wires 35. Itis furthermoredesirable to have a guide for the material which is fed tothe screen to insureits discharge onto the active part of the screencloth 34 and to keep it ofi the attaching means or tensioning means. Ihave provided a simple but very effective structure which accomplishesall three of these results which I will now describe.

Attached to and extending longitudinally of the side member I5 is aninverted channel member 48. This channel member 40 extends inwardl ofthe side member I5 and at its inner corner i provided with a rod 4Iwelded thereto which cooperates with a ledge 42 welded on the opposedflange of the channel member 40 to form an attaching means for the endbar 36. The channel member 40 cooperates with an upwardly extending andoutwardly sloping plate 43 which is welded at its bottom to the channelmember 40 and at its top to the top flange I8 of the side member 15. Itis evident that the flange I8, plate 43, channel 40 and cooperatingportion of the side member I5 cooperate to form a box-like reinforcingand guiding member.

The end bar 31, or plurality of end bars, if there is more than onesection to the screen cloth 34, is attached by an attaching'mechanismcomprising an inverted channel 44 having a rod 45 extending along andwelded into the outer corner thereof and a ledge 43 extending along andwelded to the opposite flange thereof which forms an attaching means forthe end bar 31. If desired, there may be a single channel 44 whichextends the full length of the deck or sash II] to receive thesuccessive end bars 31 of the several sections of the screen cloth 34or, if otherwise desired, and preferably, there is a channel 44 with thecooperating end bar attaching means above described for each section ofsaid screen cloth 34, each of which several channels 44 may beindividually adjusted.

To provide for the adjustment of the channels 44, each of them isprovided With a plurality of rilgidly attached adjusting bolts 41 whichare welded to the channel 44 and abut a metal strip 48 also welded tothe top of the channel 44. The bolts 41 extend through apertures in theside member I4 and are provided with adjusting nuts 49 and associatedwashers. By reference to Fig. l of the drawings, it will be seen thatthe bolts 41 and nuts 49 are in longitudinal aligmnent along the sidemember I4 of the deck or sash II).

It may also be noted that a special bolt 50 and a cooperating nut andwasher 5I is provided at substantially the center of the deck I0 andextends through arcuate slots, one of which is seen at 52 in across-plate 53 carried by the webs of the channel arm 25. This specialbolt 58 performs the same function as the bolts 41 and it is soconnected to permit the adjustment of the arms 25 and 25, as abovedescribed. If the arms 25 are swung beyond the extent of the slots 52the special bolt 50 may be removed and placed outside the extremity ofsaid arm 25.

From the above description it is evident that each of the channelmembers 44 is provided with a plurality of bolts 4'! or 41 and 50 sothat they may be adjusted to tension the various sections of the screencloth 34. i

It is particularly necessary to provide rigid reinforcement for the sidemember I4 and at a position adjacent the attaching and tensioning meansfor the screen cloth 34. To this end I provide a box-like rigidstructure which, as above mentioned, not only reinforces the side memberI4 but also acts as a guidetn insure proper alignment of the adjacentwires 35 of two adjacent sections of the screen cloth 34 and furtheracts to direct material onto the screen cloth 34 and keep it 01f theattaching and tensiom'ng means including the channels 44. This boxlikestructure is formed by a bottom web or plate 54 which extends inwardlyand substantially at right angles to the plane of side member I4 and isrigidly attached thereto, as by welding, and at a position slightlyabove and adjacent to the holes in plate I4 which receive the bolts 41and bolt 58. The bottom web or plate 54 is provided with an integral,upwardly and outwardly extending plate or member 55, the top of which isrigidly attached to the flange I6 of the side member I4, as by welding,along their contacting edges.

It is thus seen that a box-like structure is provided which has thereinforcing and guiding characteristics above set forth which is verylight in weight and yet which is very effective to reinforce the sidemember I4 which is particularly desirable with a screen cloth of theabove mentioned type due to the necessary great tensioning thereof.

It is evident by reference to Fig. 3 of the drawings that the'tops ofbolts 41 and of the metal strips 48 rest against the bottom web or plate54 to insure the proper alignment of adjacent wires 35 of adjacentsections of screen cloth 34.

In Fig. 4 of the drawings I have illustrated a slightly diiferent typeof attaching and adjusting meaons for the screen cloth 34. In thisstructure the wires 35 are rigidly attached, as by soldering, to hookplates 56 and 57. Hook plate 51 is hooked to a cooperating hook plate 58which is provided with a plurality of rivets 59 rigidly attachedthereto, as by welding, which are riveted to side member I5.

A box-shaped reinforcing and guiding structure 60, similar to that abovedescribed, including plates 54 and 55, is provided adjacent the sidemember I5 and the lower inner edge thereof is preferably welded to theinner edge of the hook plate 58. The channel 44 and associated structurehas been replaced by a hook plate 6| which is provided with a pluralityof bolts similar to the aforedescribed bolts 41 and 50, the hook plateBI cooperating with the bottom plate 54 substantially in the manner ofthe cooperation between the channel 44 and strip 48, as above described.

Here again, if the screen 34 is formed in a plurality of sections therewill, of course, be individual hook plates 56 and 51 for each individualsection and there may be one hook plate 6| which is common to all of thehook plate 55 or there may be an individual hook plate 6| for each hookplate 56. There is preferably only a single hook plate 58 since it isrigidly attached to the deck or sash I0 and is not adjustable regardlessof whether the screen cloth 34 is made in one section or a plurality ofsections.

From the above description it is evident that I have provided a verysimple but rigid reinforced deck or sash and one which is particularlyuseful where the screen cloth is subject to high tension, such as aparallel strand high carbon wire type of screen cloth. Furthermore,guide means are also formed to insure proper alignment of adjacent wiresof adjacent sections of a sectional screen cloth and a guide is providedfor the material to be screened to insure its reaching the screen clothand being kept off the attaching and tensioning structure of the screencloth.

Obviously those skilled in the art may make various changes in thedetails and arrangement of parts without departing from the spirit andscope of the invention as defined by the claims hereto appended, and Itherefore wish not to be restricted to the precise construction hereindisclosed.

Having thus described and shown an embodiment of my invention, what Idesire to secure by Letters Patent of the United States is: f

l. A screen deck comprising the combination with a frame formed ofspaced upright metal side plates at least one of which has an inwardlyextending top flange, of a reinforcing structure for-med by rigidlysecuring an inverted channel to said one side plate and connecting theinner edge of such inverted channel by an upright plate to the inneredge of said top flange, and screen cloth attaching means mounted in theunderside of said inverted channel.

2. A screen deck comprising a side plate having an inwardly extendingtop flange, a support, mechanism comprising a rivet for rigidly securingsaid support to said side plate, a reinforcing plate on said support andhaving its upper edge rigidly secured to the inner edge of said flange,and screen cloth attaching means carried by said support.

3. A screen deck comprising a side plate having an inwardly extendingt:p flange, a support, means rigidly securing said support tosaid sideplate, a reinforcing plate having its lower edge rigidly secured to saidsupport and having its upper edge rigidly secured to the inner edge ofsaid top flange, and screen cloth attaching means mounted on saidsupport.

4. A screen deck comprising a side plate having an inwardly extendingtop flange, a support, means for rigidly securing said support to saidside plate, a V-shaped reinforcing plate on said support with its upperedge rigidly secured to the inner edge of said top flange, and a screencloth attaching device carried by said support, said V- shapedreinforcing plate being mounted in posi tion to guide material from saidattaching device onto the screen cloth carried by the deck.

5. A screen deck comprising the combination of a frame formed of spacedupright metal side plates at least one of which is a channel having atop flange extending inwardly and having intermediate its top and bottomflanges a series of alined bolt receiving apertures, and a box-likestructure extending along the inner side of said channel immediatelyabove said bolt receiving apertures and serving as reinforcing andguiding means, said box-like structure comprising a bottom rigidlysecured to said channel immediately above said apertures and at rightangles to the vertical plate of said channel to extend inwardlytherefrom with an inner wall sloping upwardly from said bottom toward atop parallel to the bot tom and rigidly secured to the top flange ofsaid channel.

6. A screen deck comprising the combination of a frame formed of spacedupright metal channels with their flanges extending inwardly, thevertical plate of one of the channels having a series of alined screencloth bolt receiving apertures located intermediate the flanges of suchchannel, and reinforcing and guiding means extending longitudinallyalong such vertical plate and having the form of a rigid box-likestructure, the latter having as its outside wall a portion of saidvertical plate and having its opposite wall sloping upwardly with itsupper edge secured to the inner edge of the top flange of said channel,the bottom of said box-like structure being parallel to said top flangeand secured rigidly to the said vertical plate with such bottomimmediately above and closely adjacent to said bolt receiving apertures.

I. A screen deck comprising a frame formed of spaced-apart pairs ofsuperimposed channels, screen cloth attaching means between the lowerchannels, a reinforcing plate extending inwardly from the vertical plateof one of the lower channels and having one edge rigidly secured to suchvertical plate immediately above and close 1y adjacent said attachingmeans, and an extension from the inner edge of said reinforcing platesloping upwardly and outwardly to the upper inwardly extending flange ofthe adjacent channel with the upper edge of said extension rigidlysecured to such inwardly extending flange to complete a box-likestructure with a portion of said vertical plate forming one wall of suchstructure.

8. A screen deck comprising the combination with a frame comprisingspaced-apart upright metal plates at least one of which has an inwardlyextending top flange, of reinforcing structure comprising a bottomsupport rigidly secured to said one side (plate and an upwardly andoutwardly sloping plate secured rigidly at its lower edge to said bottomsupport and secured rigidly at its upper edge to the inner edge of saidflange, and screen tensioning means engaging the lower side of saidsupport and adapted to act only along horizontal lines while remainingat all times in engagement with said lower side of said bottom support.

9. A screen deck comprising a channel having flanges extending inwardlyfrom the upper and lower edges of an upright plate, an inverted channelhaving one of its flanges secured to said upright plate, a reinforcing,plate having its lower edge rigidly secured to the inner edge of saidinverted channel and having its upper edge rigidly secured to saidchannel, and screen cloth attaching means on the under side of saidinverted channel.

10. A screen deck comprising spaced-apart metal upright side plates, aninverted channel having one of its flanges rigidly secured to one ofsaid upright side plates, means comprising an upwardly and outwardlyinclined plate secured at its lower edge to the inner edge of saidinverted channel to reinforce the latter to form a rigid anchorage, andscreen cloth attaching means on the underside of said inverted channel.

11. A screen ideck comprising spaced-apart metal upright side plates, aninverted channel rigidly anchored to one of said plates, anotherinverted channel adjacent the other upright side plate, tensiom'ngmechanism connected to said second-named inverted channel and comprisinga series of screw-threaded rods spaced apart along said last-namedupright side plate, screen cloth attaching means on the undersides ofsaid inverted channels, and a plate rigidly connected to the first-namedinverted channel and to the adjacent upright side plate to reinforce thechannel as a rigid anchorage for the screen cloth attaching meansassociated therewith.

RICHARD D. HELLER,

